Abstract
Controlled growth of CdSe nanoneedles and nanorods was realized in a metal–organicchemical vapour deposition system by employing sputtered Au as a catalyst.The controls over the morphology, density and structure of the nanostructureswere realized by varying the growth parameters independently. By varying thegrowth temperature, the morphology of the CdSe structures can be changed fromtapered nanoneedles to uniform nanorods. Their density can also be controlledby just changing the amount of deposited Au. The changes in morphology anddensity were characterized by scanning electron microscopy. X-ray diffraction andtransmission electron microscopy show that the tapered nanoneedles crystallize inthe zinc-blende structure with the growth direction along , and the uniform nanorods in the wurtzite structure with the growth direction along.
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